TP, I'm on the 67-72 truck board and have the same truck! I'm running the Offy manifold (non heated) with a stock out of the box Edelbrock 500 carb. I tried jetting down, I tried changing the rods, but it all made it run worse so I went back to the stock configuration. I took it to the DEQ and I was well within specs and it runs like a champ. I would be happy to guide you to stock carb specs and I even have my old rods and jets if you want to try those. Check your timing and make sure it's properly set. Also, make sure you use a vacuum gauge when setting your carb. If you need help with that, just ask. Again, I'd be happy to help-just PM me through the other board. We'll get you up and running!
